RtlFreeOemString - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
#ifndef _NTRTL_H

NTSYSAPI
VOID
NTAPI
RtlFreeOemString(
    _Inout_ POEM_STRING OemString
    );

#endif

View code on GitHub

This function is documented in Windows Driver Kit.

Edit description on GitHub